Electric heater for metal-workers.



PATENTED MAY 7, 1907..

0'. LET?- APPLICATION F ILED 3313.1[ 1906.

. ATTORNEYS UNI.I.ED STATES PA ifili l 'l i @FFIQE.

JOSEPH O. LU'll-lY, OF AUSTIN, TEXAS, ASSIGNOR Oi ONE-.EOtllt'ill JOSEPH ANTON LUTHY, ONE-FOURTH TO Wll'ihijilti CH dRlilfiIS liitlC-lSLE, AND ()NlC-FOURTH TO ARTHUR MA IHEW EDWARD KRElSLE, ()F AUS- TIN, TuXAs.

ELECTRIC HEATER FQR ME'E'AL UJQFdEFiES.

Specification of Letters Patent.

."Patented May '7, 190

1 Application filed February 1,1906, Serial No. 299,013.

.flo ml/ whom, at inn/y cancer/t:

Be it known that I, J ossrn O'r'ro Lu'rnr, a citizen of Switzerland, residing at Austin, in the county of Travis and State of Texas,

5 have invented a new and useful Improvement in Electric Heaters for Metal-Workers, of which the following is a specification.

My invention is in the nature of a novel means for enabling blacksmiths, machinists,

lo and other metal workers, to quickly and conveniently heat metal to a welding temperature without the of a forge, or of a fire oi any kind. 'lheinventionis an electric heater of novel construction of parts and certain reagents forming a bath for utilizing the eiectric current through the bath to raise to a red heat any piece ol metal plunged into this bath, as hereinafter lully described with reference to the drawing, in which Figure l is a vertical central section and Fig. 2 is a perspective view of the rest forming the upper electrode.

in the drawing A represents a containing vessel [or the bath which vessel is made of any material which is a nonconductor of electricity, such. as lire clay, and which may be of any desired shape. it is mounted on suitable legs K and is open at the top.

l) is the lower electrode which is made oi a plate or block of carbon mounted upon and vertically adjustable with a central metal stem E. This stein enters a central opening in the bottom ol the vessel Afso as to connect with the carbon electrode within the vessel. The opening through which the stem passes is formed by a metal bushing l having a llai'igcfinside the vessel and a stulling box w at its lower end to render the joint liquid tight. A screw nutj" turns uoon an exterior thread oi' the bushing l and serves to clamp the material of the vessel lirmly between the llangefol" the bushing and said nut f. (in top of the carbon electrode i) is a non-conducting guard plate (I, l'or the purpose hereafter described.

The vessel A is lillcd nearly to the top with a solution oi sail amnioniac in water, about one tcaspoonl'ul of the crystals oi sal ammo- 5 niac to one quart of water. On top of the surface of this bath is a lloatinglayeroi' pulverizcd graphite l.. The upper edge of the vessel A preferably has an inturned lip a which may be formed integrally with the vessel.

M is a verticai standard contained in a socket it carried by a metal band P encircling the vessel A.

This standard M forms the support for the upper electrode and it is attached at its upper end to a circular rest .h

which extends around the upper edge of the vessel A. The standard M is provided with any suitable number of binding posts 1' N N to which corresponding insulated wires n are connected, winch wires at their ends provided with Clasps or socket pieces 0 O 0 adapted to seize and firmly hold the bar or other piece of metal to be heated.

J is the binding post with which the wire for the upper electrode connects, and I is binding post with which the wire for lower electrode connects. i is connected to the metal bushing at bottom of the vessel A and is in electr the the The binding post the real connection with the stem E and carbon electrode l). The binding post J connects with thesocket it for standard M, which with its wires and clasps 0 and rest 11 forms a multiple upper electrode.connection. The hi ing post J is so connected with the socke as to permit the standard M to be raiser lowered and also ailows the rest ii to ndt it l or swun around the vertical axis oi standard M The operation cl my heater is as lollows. The rod, or rods, or other pieces of metal to be heated and welded, are secured in the clasps i) and a. current oi -220 volts and 5 ampores, more or less is turned into the binding posts ii and J U are then. dipped through the graphite la The rods held by the elasps and into the solution of sal ammoniac to depth as lar as it is desired to heat the rods 'ilhesc rods then become icrminais and the (:ltli

while hot. upper olm-trode the from the lower carbon electrode l) passing through the sal ammoniac bath and into rods will heat the latter white hot la the r as

they are immersed and they may hen be withdrawn and quickly welded together.

lOO 

